A steerable surgical forceps

Abstract

The present invention discloses a steerable surgical forceps, wherein a fixed handle and a movable handle are hinged, a proximal end of a forceps rod is fixedly connected to a thumbwheel, which is sleeved on a sleeve of the fixed handle; a rack mechanism is provided in the sleeve; a distal end of the forceps rod is hinged to a steering seat via a steering pin, which is fixedly connected to the steering seat, and a first forceps head and a second forceps head are hinged on the steering seat; a first opening and closing gear and a second opening and closing gear that mesh with each other are provided in the steering seat; an opening and closing drive gear that meshes with the rack mechanism is provided in the thumbwheel, and a first traction rope loop is fixedly provided between the opening and closing drive gear and the first opening and closing gear; a steering knob is also rotatably provided on the thumbwheel, and a second traction rope loop is fixedly provided on the portion of the thumbwheel located inside the fixed sleeve, which passes through the forceps rod and is fixedly sleeved on the steering pin. The surgical forceps of the present invention can realize the opening and closing of the forceps head while realizing the rotation and steering of the forceps head, thereby facilitating the operation of laparoscopic surgery and providing a better surgical field of view.

Description

Technical Field

[0001] The invention relates to a pair of steerable surgical forceps, belonging to the technical field of medical instruments. Background Art

[0002] During laparoscopic surgery, tissues and organs within the human abdominal cavity need to be located, separated, imaged, resected, and electrocoagulated for hemostasis. During the procedure, these organs are interconnected, requiring the coordinated use of multiple forceps. Existing laparoscopic forceps typically have straight shafts, with the handle, shaft, and head all aligned. When two forceps are inserted into the abdominal cavity through the same incision, they experience a "coaxial parallelism" or "chopstick effect," causing them to become tangled and hindering the procedure. Furthermore, the alignment of the lens and forceps can affect the surgeon's perception of three-dimensional space. Summary of the Invention

[0003] In order to overcome the problems existing in the prior art, the present invention provides a steerable surgical forceps, which can realize the steering of the surgical forceps and improve the convenience of using the surgical forceps. The specific technical solution is as follows.

[0004] A steerable surgical forceps comprises a fixed handle, a movable handle, a forceps rod and a thumbwheel, wherein the fixed handle and the movable handle are hinged, the proximal end of the forceps rod is fixedly connected to the thumbwheel, and the thumbwheel is sleeved on the sleeve of the fixed handle; the characteristics are:

[0005] A rack mechanism is provided in the sleeve, and the movable handle is used to drive the rack mechanism to move;

[0006] The distal end of the pliers rod is hinged to the steering seat via a steering pin, the steering pin is fixedly connected to the steering seat, a first pliers head and a second pliers head are hinged to the steering seat, and the proximal ends of the first pliers head and the second pliers head are provided with gears; a first opening and closing gear for engaging with the first pliers head and a second opening and closing gear for engaging with the second pliers head are provided in the steering seat, and the first opening and closing gear and the second opening and closing gear are engaged with each other; the pliers rod is a hollow structure;

[0007] An opening and closing drive gear meshing with the rack mechanism is provided in the dial wheel, and a first traction rope loop is fixedly sleeved on the opening and closing drive gear. The first traction rope loop passes through the clamp rod and is fixedly sleeved on the first opening and closing gear.

[0008] A steering knob is also rotatably provided on the thumbwheel, wherein a portion of the steering knob is located outside the thumbwheel and a portion is located inside the thumbwheel. The portion located inside the thumbwheel is fixedly sleeved with a second traction rope loop, which passes through the clamp rod and is fixedly sleeved with the steering pin.

[0009] The above-mentioned technical solution is adopted, and the movable handle is used to drive the rack mechanism to move, thereby driving the opening and closing driving gear to rotate. The opening and closing driving gear drives the first opening and closing gear to rotate through the first traction rope loop, thereby realizing the opening and closing of the first pliers head and the second pliers head; when the first pliers head and the second pliers head need to turn, the steering knob is rotated, and the steering knob drives the steering pin to rotate through the second traction rope loop, thereby realizing the turning of the first pliers head and the second pliers head; at the same time, the dial wheel can also be used to rotate the pliers rod and the first pliers head and the second pliers head. The surgical forceps of the present invention can realize the rotation and steering of the pliers head while realizing the opening and closing of the pliers head, which is beneficial to the operation of laparoscopic surgery and provides a better surgical field of view.

[0010] Furthermore, a first opening and closing adjustment wheel and a second opening and closing adjustment wheel are provided within the dial wheel, and the first traction rope loop wraps around a portion of the first opening and closing adjustment wheel and a portion of the second opening and closing adjustment wheel. The first opening and closing adjustment wheel and the second opening and closing adjustment wheel are used to adjust the direction of the first traction rope loop so that the first traction rope loop is positioned as close to the center of the clamp rod as possible, and the first opening and closing adjustment wheel and the second opening and closing adjustment wheel can also play a role in tensioning the first traction rope loop.

[0011] Furthermore, a first steering adjustment wheel and a second steering adjustment wheel are provided within the dial wheel, and the second traction rope loop is wrapped around a portion of the first steering adjustment wheel and a portion of the second steering adjustment wheel. The first and second steering adjustment wheels are used to adjust the direction of the second traction rope loop, maximizing the center of the second traction rope loop. The first and second steering adjustment wheels also function to tension the second traction rope loop.

[0012] Furthermore, the rack mechanism includes a ball head connecting rod and a rack, one end of the ball head connecting rod has a ball head, and the other end is hinged to one end of the rack; a cylindrical groove is provided in the movable handle, and the ball head is accommodated in the cylindrical groove. When the movable handle rotates relative to the fixed handle, the movable handle can drive the rack to move.

[0013] Furthermore, the gears of the first pliers and the second pliers are coaxially sleeved on the pliers pin, and the first pliers and the second pliers are hinged to the steering seat via the pliers pin. The coaxial arrangement of the gears of the first pliers and the second pliers is conducive to reducing the installation space.

[0014] Compared with the prior art, the surgical forceps of the present invention can realize the opening and closing of the forceps head while realizing the rotation and steering of the forceps head, which is beneficial to the operation of laparoscopic surgery and provides a better surgical field of view. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a front view of the steerable surgical forceps of the present invention;

[0016] Figure 2 is an exploded schematic diagram of the steerable surgical forceps of the present invention;

[0017] Figure 3 is a cross-sectional view of the steerable surgical forceps of the present invention;

[0018] Figure 4 It is a schematic diagram of the principle of the clamping control mechanism;

[0019] Figure 5 It is a schematic diagram of the steering mechanism principle;

[0020] Figure 6 It is a schematic diagram of the rack mechanism structure.

[0021] In the figure: movable handle 1, cylindrical slot 1.1, fixed handle 2, sleeve 2.1, dial wheel 3, clamp rod 4, first clamp head 5, second clamp head 6, steering seat 7, clamp rod fixing seat 8, rivet 9, first opening and closing gear 10, second opening and closing gear 11, first traction rope loop 12, second traction rope loop 13, steering pin 14, opening and closing drive gear 15, steering knob 16, rack mechanism 17, rack 17.1, rack pin 17.2, ball head connecting rod 17.3, first opening and closing adjustment wheel 18, second opening and closing adjustment wheel 19, transmission pin 20, clamp head pin 21, first steering adjustment wheel 22, second steering adjustment wheel 23. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below with reference to the accompanying drawings.

[0023] See also Figures 1-6 The steerable surgical forceps mainly includes a movable handle 1, a fixed handle 2, a clamp rod 4 and a thumbwheel 3. The fixed handle 2 and the movable handle 1 are hinged by a rivet 9. The proximal end of the clamp rod 4 is fixedly connected to the thumbwheel 3. The thumbwheel 3 (which can be a two-half structure) is sleeved on the sleeve 2.1 of the fixed handle 2. The thumbwheel 3 can rotate relative to the fixed handle 2.

[0024] A rack mechanism is provided in the sleeve 2.1, and the movable handle 1 is used to drive the rack mechanism to move; the rack mechanism includes a ball-end connecting rod 17.3 and a rack 17.1, one end of the ball-end connecting rod 17.3 has a ball head, and the other end is hinged to one end of the rack 17.1 through a rack pin 17.2; a cylindrical groove 1.1 is provided in the movable handle 1, and the ball head is accommodated in the cylindrical groove 1.1. When the movable handle 1 rotates relative to the fixed handle 2, the movable handle 1 can drive the rack 17.1 to move in the sleeve 2.1, and the sleeve 2.1 can be provided with a guide rail structure (not shown) for guiding the rack 17.1; the proximal end of the ball-end connecting rod 17.3 is a ball head, which not only ensures that force can be transmitted between the movable handle 1 and the ball-end connecting rod 17-3, but also enables the ball-end connecting rod 17-3 to rotate relative to the movable handle 1;

[0025] The distal end of the clamp rod 4 is a clamp rod fixing seat 8, which is hinged to the steering seat 7 via a steering pin 14. The steering pin 14 is fixedly connected to the steering seat 7. A first clamp head 5 and a second clamp head 6 are hinged to the steering seat 7, and the proximal ends of the first clamp head 5 and the second clamp head 6 are provided with gears; a first opening and closing gear 10 for engaging with the first clamp head 5 and a second opening and closing gear 11 for engaging with the second clamp head 6 are provided in the steering seat 7, and the first opening and closing gear 10 and the second opening and closing gear 11 are meshed with each other; the clamp rod 14 is a hollow structure;

[0026] An opening and closing drive gear 15 meshing with the rack 17.1 is provided in the dial wheel 3. The opening and closing drive gear 15 is fixedly sleeved with a first traction rope loop 12. The first traction rope loop 12 passes through the clamp rod 14 and is fixedly sleeved with the first opening and closing gear 10.

[0027] A steering knob 16 is also rotatably provided on the dial wheel 3. Part of the steering knob 16 is located outside the dial wheel 3, and part of it is located inside the dial wheel 3. The part located inside the dial wheel 3 is fixedly sleeved with a second traction rope loop 13. The second traction rope loop 13 passes through the clamp rod 14 and is fixedly sleeved with the steering pin 14.

[0028] Among them, the distal end and proximal end are relative to the user of the surgical forceps, the end away from the operator is the distal end, and the end close to the operator is the proximal end; the forward and backward movement is also relative to the user of the surgical scissors, the end away from the operator is the front, and the end close to the operator is the back.

[0029] A first opening and closing adjustment wheel 18 and a second opening and closing adjustment wheel 19 are also provided in the dial wheel 3. The first traction rope loop 12 wraps around a portion of the first opening and closing adjustment wheel 18 and a portion of the second opening and closing adjustment wheel 19. The first opening and closing adjustment wheel 18 and the second opening and closing adjustment wheel 19 are used to adjust the direction of the first traction rope loop 12 so that the first traction rope loop 12 is located at the center of the clamp rod 4 as much as possible. In addition, the first opening and closing adjustment wheel 18 and the second opening and closing adjustment wheel 19 can play the role of tensioning the first traction rope loop 12; an elastic adjustment mechanism (such as a bias spring, etc.) can also be applied to the first opening and closing adjustment wheel 18 and the second opening and closing adjustment wheel 19.

[0030] A first steering adjustment wheel 22 and a second steering adjustment wheel 23 are also provided in the dial wheel 3. The second traction rope loop 13 wraps around a part of the first steering adjustment wheel 22 and a part of the second steering adjustment wheel 23. The first steering adjustment wheel 23 and the second steering adjustment wheel 23 are used to adjust the direction of the second traction rope loop 13, so that the second traction rope loop 13 is located in the center of the clamp rod 4 as much as possible, and the first steering adjustment wheel 22 and the second steering adjustment wheel 23 can play a role in tensioning the second traction rope loop 13.

[0031] The gear of the first pliers 5 and the gear of the second pliers 6 are coaxially sleeved on the pliers pin 21. The first pliers 5 and the second pliers 6 are hinged to the steering seat 7 through the pliers pin 21. The coaxial arrangement of the gears of the first pliers 5 and the second pliers 6 is beneficial to reducing the installation space.

[0032] Specifically, the opening and closing drive gear 15 is transformed from the reciprocating motion of the rack mechanism 17 to the rotational motion of the opening and closing drive gear 15. The outer circle of the opening and closing drive gear 15 is fixedly sleeved with a first traction rope loop 12. The first traction rope loop 12 is adjusted by the first opening and closing adjustment wheel 18 and the second opening and closing adjustment wheel 19 and then passes through the clamp rod 4 to be connected to the outer periphery of the first opening and closing gear 10, driving the first opening and closing gear 10 to rotate around the transmission pin 20. The first opening and closing gear 10 is axially provided with first teeth and second teeth. The first teeth of the first opening and closing gear 10 are engaged with the gear of the first pliers 5, driving the first pliers 5 to rotate around the pliers pin 21 to realize the opening and closing of the gear of the first pliers 5; the second teeth of the first opening and closing gear 10 are engaged with the second opening and closing gear 11, and the second opening and closing gear 11 is engaged with the gear of the second pliers 6, driving the second pliers 6 to rotate around the pliers pin 21 to realize the opening and closing of the second pliers 6.

[0033] Specifically, the steering mechanism includes a turning knob 16, a first steering adjustment wheel 22, a second steering adjustment wheel 23, a second traction rope loop 13, and a steering seat 7; a part of the turning knob 16 is arranged outside the dial wheel 3, and the turning knob 16 is located inside the dial wheel 3. A second traction rope loop 13 is fixed on the outer periphery. After the second traction rope loop 13 is adjusted by the first steering adjustment wheel 22 and the second steering adjustment wheel 23, it passes through the clamp rod 4 and is connected to the steering seat 7, driving the steering seat 7 to rotate around the steering pin 14, thereby realizing the steering movement of the clamp head.

[0034] When the movable handle 1 is opened relative to the fixed handle 2, the ball connecting rod 17-3 drives the rack 17-1 to move toward the distal end through the rack pin 17-2, and the rack 17-1 drives the opening and closing drive gear 15 to rotate counterclockwise through the toothed engagement, and the opening and closing drive gear 15 drives the first opening and closing gear 10 to rotate clockwise through the first traction rope loop 12, and the first opening and closing gear 10 drives the first pliers 5 to rotate counterclockwise through the toothed engagement, thereby realizing the opening action of the first pliers 5; the first opening and closing gear 10 drives the second opening and closing gear 11 to rotate counterclockwise through the toothed engagement, and the second opening and closing gear 11 drives the second pliers 5 to rotate clockwise through the toothed engagement, thereby realizing the opening action of the second pliers 6. Conversely, when the movable handle 1 is closed relative to the fixed handle 2, the first pliers 5 and the second pliers 6 perform a closing action.

[0035] When the steering direction of the pliers head needs to be adjusted, it is only necessary to adjust the angle of the turning knob 16. The turning knob 16 drives the steering seat 7 to rotate through the second traction rope loop 13, and the steering seat 7 drives the pliers head to rotate.

[0036] The embodiments of the present invention are described above in conjunction with the accompanying drawings. The embodiments of the present invention and the features thereof may be combined with each other unless there is any conflict. The present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Under the guidance of the present invention, those skilled in the art may devise various forms without departing from the spirit of the present invention and the scope of protection of the claims. All of these forms fall within the scope of protection of the present invention.

Claims

1. A steerable surgical forceps comprising a fixed handle (2), a movable handle (1), a forceps rod (4) and a thumbwheel (3), wherein the fixed handle (2) and the movable handle (1) are hinged, the proximal end of the forceps rod (4) is fixedly connected to the thumbwheel (3), and the thumbwheel (3) is sleeved on a sleeve (2.1) of the fixed handle (2); characterized in that: A rack mechanism is provided in the sleeve (2.1), and the movable handle (1) is used to drive the rack mechanism to move; The distal end of the clamp rod (4) is hinged to the steering seat (7) via a steering pin (14), the steering pin (14) is fixedly connected to the steering seat (7), a first clamp head (5) and a second clamp head (6) are hinged to the steering seat (7), and the proximal ends of the first clamp head (5) and the second clamp head (6) are provided with gears; a first opening and closing gear (10) for engaging with the first clamp head (5) and a second opening and closing gear (11) for engaging with the second clamp head (6) are provided in the steering seat (7), and the first opening and closing gear (10) and the second opening and closing gear (11) are engaged with each other; the clamp rod (4) is a hollow structure; An opening and closing drive gear (15) meshing with the rack mechanism is provided in the thumbwheel (3); a first traction rope loop (12) is fixedly sleeved on the opening and closing drive gear (15); the first traction rope loop (12) passes through the clamp rod (4) and is fixedly sleeved on the first opening and closing gear (10); A steering knob (16) is also rotatably provided on the thumbwheel (3), a portion of the steering knob (16) is located outside the thumbwheel (3), and a portion is located inside the thumbwheel (3), and a second traction rope loop (13) is fixedly sleeved on the portion located inside the thumbwheel (3), and the second traction rope loop (13) passes through the clamp rod (4) and is fixedly sleeved on the steering pin (14); The rack mechanism comprises a ball-end connecting rod (17.3) and a rack (17.1); one end of the ball-end connecting rod (17.3) has a ball head, and the other end is hinged to one end of the rack (17.1); a cylindrical groove (1.1) is provided in the movable handle (1), and the ball head is accommodated in the cylindrical groove (1.1); when the movable handle (1) rotates relative to the fixed handle (2), the movable handle (1) can drive the rack (17.1) to move.

2. A steerable surgical forceps according to claim 1, characterized in that: A first opening and closing adjustment wheel (18) and a second opening and closing adjustment wheel (19) are also provided in the thumbwheel (3), and the first traction rope loop (12) surrounds a portion of the first opening and closing adjustment wheel (18) and a portion of the second opening and closing adjustment wheel (19).

3. A steerable surgical forceps according to claim 1, characterized in that: A first steering adjustment wheel (22) and a second steering adjustment wheel (23) are also provided in the thumbwheel (3), and the second traction rope loop (13) surrounds a portion of the first steering adjustment wheel (22) and a portion of the second steering adjustment wheel (23).

4. A steerable surgical forceps according to claim 1, characterized in that: The gear of the first pliers head (5) and the gear of the second pliers head (6) are coaxially sleeved on the pliers head pin (21), and the first pliers head (5) and the second pliers head (6) are hinged to the steering seat (7) via the pliers head pin (21).

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